单项选择题Which information must automatic identification systems (AIS) automatically provide to appropriately equipped shore stations,vessels and aircraft? ()

A.Vessel's type
B.Vessel's course
C.Navigational status
D.All of the above


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1.单项选择题When should the emergency position-indicating radiobeacon be activated after abandoning a ship?()

A.Immediately
B.After one hour
C.Only when another vessel is in sight
D.Only after sunset

2.单项选择题When may the automatic identification system (AIS) be switched off? ()

A.At anytime as long as it is properly logged
B.At the Master's professional judgment
C.Only when the vessel is at anchor or in port
D.Under no circumstance

4.单项选择题To reduce the amount of catenary you may().

A.shorten the hawser or increase the tug's speed
B.lengthen the hawser or reduce the tug's speed
C.place your tug in irons
D.make a sharp turn

5.单项选择题The Vessel Bridge-to-Bridge Radiotelephone Act applies to which towboat?()

A.A 100 GT towboat,24 feet in length
B.A 90-foot towboat tied to the pier
C.A 60-foot towboat towing by pushing ahead
D.A 400 GT towboat anchored

6.单项选择题The Vessel Bridge-to-Bridge Radiotelephone Act applies to().

A.every towing vessel of 16 feet or over in length while navigating
B.every vessel of 50 GT and upward,carrying one or more persons for hire
C.all aircraft operating on the water
D.every power-driven vessel of 20 meters and upward while navigating

7.单项选择题The unit of duration of a dash in Morse Code is().

A.one and one-half times the length of a dot
B.twice the length of a dot
C.three times the length of a dot
D.four times the length of a dot

8.单项选择题The range of a SSB transmission is MOST affected by().

A.atmospheric noise and radiated power
B.the frequency band selected and time of day or night
C.interference and position of the moon
D.radiated power and nearness to shore

9.单项选择题The light rhythm of Morse (A) is shown on().

A.preferred-channel buoys
B.starboard- or port-side buoys
C.special marks
D.safe water buoys

10.单项选择题The following()is a standard phrase.

A.You may enter fairway
B.You should enter fairway
C.ANSWER. It is permitted to enter fairway
D.You could enter fairway